/******************************************************
 *
 *  des.c
 *  common des......
 *
 ******************************************************/

 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include "des.h"
 
 /*********************************************************
   data type definition for Des;
 **********************************************************/
 #define EN0	0
 #define DE1	1
 
 #define DES_KEYBYTES	128
 #define DES_KEYLONGS	32
 #define DES_BLOCKLEN	8
 
 typedef struct {
     unsigned char ek[DES_KEYBYTES];
     int	ekLen;
     unsigned char dk[DES_KEYBYTES];
     int	dkLen;
     unsigned char CbcCtx[DES_BLOCKLEN];
 } DES_CTX;
 
 typedef struct {
     unsigned char ek1[DES_KEYBYTES];
     int	ek1Len;
     unsigned char dk1[DES_KEYBYTES];
     int	dk1Len;
     unsigned char ek2[DES_KEYBYTES];
     int	ek2Len;
     unsigned char dk2[DES_KEYBYTES];
     int	dk2Len;
     unsigned char CbcCtx[DES_BLOCKLEN];
     //int	IsFirstBlock;
 } DES3_CTX;
 
 
 static unsigned char pc1[56] = {
     56, 48, 40, 32, 24, 16,  8,  0, 57, 49, 41, 33, 25, 17,
      9,  1, 58, 50, 42, 34, 26, 18, 10,  2, 59, 51, 43, 35,
     62, 54, 46, 38, 30, 22, 14,  6, 61, 53, 45, 37, 29, 21,
     13,  5, 60, 52, 44, 36, 28, 20, 12,  4, 27, 19, 11,  3 };
 
 static unsigned char pc2[48] = {
     13, 16, 10, 23,  0,  4,		 2, 27, 14,  5, 20,  9,
     22, 18, 11,  3, 25,  7, 	15,  6, 26, 19, 12,  1,
     40, 51, 30, 36, 46, 54,		29, 39, 50, 44, 32, 47,
     43, 48, 38, 55, 33, 52, 	45, 41, 49, 35, 28, 31 };
 
 static unsigned short bytebit[8] = {0200,0100,040,020,010,04,02,01 };
 static unsigned char totrot[16] = {1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28};
 static unsigned long bigbyte[24] = {
     0x800000L,	0x400000L,	0x200000L,	0x100000L,
     0x80000L,	0x40000L,	0x20000L,	0x10000L,
     0x8000L,	0x4000L,	0x2000L,	0x1000L,
     0x800L,		0x400L,		0x200L,		0x100L,
     0x80L,		0x40L,		0x20L,		0x10L,
     0x8L,		0x4L,		0x2L,		0x1L	};
 
 //insert digits
 static unsigned long SP1[64] ={
        0x01010400l,0x00000000l,0x00010000l,0x01010404l,
        0x01010004l,0x00010404l,0x00000004l,0x00010000l,
        0x00000400l,0x01010400l,0x01010404l,0x00000400l,
        0x01000404l,0x01010004l,0x01000000l,0x00000004l,
        0x00000404l,0x01000400l,0x01000400l,0x00010400l,
        0x00010400l,0x01010000l,0x01010000l,0x01000404l,
        0x00010004l,0x01000004l,0x01000004l,0x00010004l,
        0x00000000l,0x00000404l,0x00010404l,0x01000000l,
        0x00010000l,0x01010404l,0x00000004l,0x01010000l,
        0x01010400l,0x01000000l,0x01000000l,0x00000400l,
        0x01010004l,0x00010000l,0x00010400l,0x01000004l,
        0x00000400l,0x00000004l,0x01000404l,0x00010404l,
        0x01010404l,0x00010004l,0x01010000l,0x01000404l,
        0x01000004l,0x00000404l,0x00010404l,0x01010400l,
        0x00000404l,0x01000400l,0x01000400l,0x00000000l,
        0x00010004l,0x00010400l,0x00000000l,0x01010004l };
        
        
 static unsigned long SP2[64]={
        0x80108020l,0x80008000l,0x00008000l,0x00108020l,
        0x00100000l,0x00000020l,0x80100020l,0x80008020l,
        0x80000020l,0x80108020l,0x80108000l,0x80000000l,
        0x80008000l,0x00100000l,0x00000020l,0x80100020l,
        0x00108000l,0x00100020l,0x80008020l,0x00000000l,
        0x80000000l,0x00008000l,0x00108020l,0x80100000l,
        0x00100020l,0x80000020l,0x00000000l,0x00108000l,
        0x00008020l,0x80108000l,0x80100000l,0x00008020l,
        0x00000000l,0x00108020l,0x80100020l,0x00100000l,
        0x80008020l,0x80100000l,0x80108000l,0x00008000l,
        0x80100000l,0x80008000l,0x00000020l,0x80108020l,
        0x00108020l,0x00000020l,0x00008000l,0x80000000l,
        0x00008020l,0x80108000l,0x00100000l,0x80000020l,
        0x00100020l,0x80008020l,0x80000020l,0x00100020l,
        0x00108000l,0x00000000l,0x80008000l,0x00008020l,
        0x80000000l,0x80100020l,0x80108020l,0x00108000l };
        
        
 static unsigned long SP3[64]={ 
        0x00000208l,0x08020200l,0x00000000l,0x08020008l,
        0x08000200l,0x00000000l,0x00020208l,0x08000200l,
        0x00020008l,0x08000008l,0x08000008l,0x00020000l,
        0x08020208l,0x00020008l,0x08020000l,0x00000208l,
        0x08000000l,0x00000008l,0x08020200l,0x00000200l,
        0x00020200l,0x08020000l,0x08020008l,0x00020208l,
        0x08000208l,0x00020200l,0x00020000l,0x08000208l,
        0x00000008l,0x08020208l,0x00000200l,0x08000000l,
        0x08020200l,0x08000000l,0x00020008l,0x00000208l,
        0x00020000l,0x08020200l,0x08000200l,0x00000000l,
        0x00000200l,0x00020008l,0x08020208l,0x08000200l,
        0x08000008l,0x00000200l,0x00000000l,0x08020008l,
        0x08000208l,0x00020000l,0x08000000l,0x08020208l,
        0x00000008l,0x00020208l,0x00020200l,0x08000008l,
        0x08020000l,0x08000208l,0x00000208l,0x08020000l,
        0x00020208l,0x00000008l,0x08020008l,0x00020200l };
        
        
 static unsigned long SP4[64]={             
        0x00802001l,0x00002081l,0x00002081l,0x00000080l,
        0x00802080l,0x00800081l,0x00800001l,0x00002001l,
        0x00000000l,0x00802000l,0x00802000l,0x00802081l,
        0x00000081l,0x00000000l,0x00800080l,0x00800001l,
        0x00000001l,0x00002000l,0x00800000l,0x00802001l,
        0x00000080l,0x00800000l,0x00002001l,0x00002080l,
        0x00800081l,0x00000001l,0x00002080l,0x00800080l,
        0x00002000l,0x00802080l,0x00802081l,0x00000081l,
        0x00800080l,0x00800001l,0x00802000l,0x00802081l,
        0x00000081l,0x00000000l,0x00000000l,0x00802000l,
        0x00002080l,0x00800080l,0x00800081l,0x00000001l,
        0x00802001l,0x00002081l,0x00002081l,0x00000080l,
        0x00802081l,0x00000081l,0x00000001l,0x00002000l,
        0x00800001l,0x00002001l,0x00802080l,0x00800081l,
        0x00002001l,0x00002080l,0x00800000l,0x00802001l,
        0x00000080l,0x00800000l,0x00002000l,0x00802080l };
        
        
 static unsigned long SP5[64]={   
        0x00000100l,0x02080100l,0x02080000l,0x42000100l,
        0x00080000l,0x00000100l,0x40000000l,0x02080000l,
        0x40080100l,0x00080000l,0x02000100l,0x40080100l,
        0x42000100l,0x42080000l,0x00080100l,0x40000000l,
        0x02000000l,0x40080000l,0x40080000l,0x00000000l,
        0x40000100l,0x42080100l,0x42080100l,0x02000100l,
        0x42080000l,0x40000100l,0x00000000l,0x42000000l,
        0x02080100l,0x02000000l,0x42000000l,0x00080100l,
        0x00080000l,0x42000100l,0x00000100l,0x02000000l,
        0x40000000l,0x02080000l,0x42000100l,0x40080100l,
        0x02000100l,0x40000000l,0x42080000l,0x02080100l,
        0x40080100l,0x00000100l,0x20000000l,0x42080000l,
        0x42080100l,0x00080100l,0x42000000l,0x42080100l,
        0x02080000l,0x02000100l,0x40000100l,0x00080000l,
        0x00080100l,0x02000100l,0x40000100l,0x00080000l,
        0x00000000l,0x40080000l,0x02080100l,0x40000100l };
        
        
 static unsigned long SP6[64]={ 
        0x20000010l,0x20400000l,0x00004000l,0x20404010l,
        0x20400000l,0x00000010l,0x20404010l,0x00400000l,
        0x20004000l,0x00404010l,0x00400000l,0x20000010l,
        0x00400010l,0x20004000l,0x20000000l,0x00004010l,
        0x00000000l,0x00400010l,0x20004010l,0x00004000l,
        0x00404000l,0x20004010l,0x00000010l,0x20400010l,
        0x20400010l,0x00000000l,0x00404010l,0x20404000l,
        0x00004010l,0x00404000l,0x20404000l,0x20000000l,
        0x20004000l,0x00000010l,0x20400010l,0x00404000l,
        0x20404010l,0x00400000l,0x00004010l,0x20000010l,
        0x00400000l,0x20004000l,0x20000000l,0x00004010l,
        0x20000010l,0x20404010l,0x00404000l,0x20400000l,
        0x00404010l,0x20404000l,0x00000000l,0x20400010l,
        0x00000010l,0x00004000l,0x20400000l,0x00404010l,
        0x00004000l,0x00400010l,0x20004010l,0x00000000l,
        0x20404000l,0x20000000l,0x00400010l,0x20004010l };  
             
 static unsigned long SP7[64] = {
     0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
     0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
     0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
     0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
     0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
     0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
     0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
     0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
     0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
     0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
     0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
     0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
     0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
     0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
     0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
     0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };
     
 static unsigned long SP8[64] = {
     0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
     0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
     0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
     0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
     0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
     0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
     0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
     0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
     0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
     0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
     0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
     0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
     0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
     0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
     0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
     0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };
 
 void deskey(unsigned char *key,short edf, unsigned long *kn);
 void cookey(register unsigned long *raw1, unsigned long *dough);
 //void cpkey(register unsigned long *into);
 //void usekey(register unsigned long *from);
 //void des(unsigned char *inblock,unsigned char *outblock);
 void scrunch(register unsigned char *outof, register unsigned long *into);
 void unscrun(register unsigned long *outof, register unsigned char *into);
 void desfunc(register unsigned long *block,register unsigned long *keys);
 
 /*****************  DES Function  *****************/
 unsigned long OPENCOMM_DesExpandEncKey(
         unsigned char *pbDesKey,
         unsigned long  ulDesKeyLen,
         unsigned char *pbDesEncKey,
         unsigned long *ulDesEncKeyLen);
 
 unsigned long OPENCOMM_DesExpandDecKey(
         unsigned char *pbDesKey,
         unsigned long  ulDesKeyLen,
         unsigned char *pbDesDecKey,
         unsigned long *ulDesDecKeyLen);
 
 unsigned long OPENCOMM_DesEncRaw(
         unsigned char *pbDesEncKey,
         unsigned long  ulDesEncKeyLen,
         unsigned char *pbInData,
         unsigned long  ulInDataLen,
         unsigned char *pbOutData,
         unsigned long *ulOutDataLen);
 
 unsigned long OPENCOMM_DesDecRaw(
         unsigned char *pbDesDecKey,
         unsigned long  ulDesDecKeyLen,
         unsigned char *pbInData,
         unsigned long  ulInDataLen,
         unsigned char *pbOutData,
         unsigned long *ulOutDataLen);
 
 
 int myic_DESDecrypt(
         unsigned char *pDesKey,
         int            nDesKeyLen,
         unsigned char *pInData,
         int            nInDataLen,
         unsigned char *pOutData,
         int           *pOutDataLen);
 
 int myic_DESEncrypt(
         unsigned char *pDesKey,
         int            nDesKeyLen,
         unsigned char *pInData,
         int            nInDataLen,
         unsigned char *pOutData,
         int           *pOutDataLen);
 
 
 void deskey(unsigned char *key,short edf, unsigned long *kn)
 {
     register int i, j, l, m, n;
     unsigned long pc1m[56],pcr[56];
     
     
     for ( j = 0; j < 56; j++ ) 
     {
         l = pc1[j];
         m = l & 07;
         pc1m[j] = (((unsigned long) key[l >> 3] & (unsigned long)bytebit[m] ) ? 1:0);
     }
     for ( i = 0;i < 16; i++)
     {
         if ( edf == DE1 )	m = (15 - i) << 1;
         else	m = i << 1;
         n = m + 1;
         kn[m] = kn[n] = 0L;
         for ( j = 0; j < 28; j++ )
         {
             l = j + totrot[i];
             if ( l < 28 )	pcr[j] = pc1m[l];
             else	pcr[j] = pc1m[l-28];
         }
         for (j = 28; j < 56; j++ ) 
         {
             l = j + totrot[i];
             if ( l < 56 )	pcr[j] = pc1m[l];
             else	pcr[j] = pc1m[l-28];
         } 
         for ( j = 0; j < 24; j++ ) 
         {
             if ( pcr[pc2[j]] )	kn[m] |= bigbyte[j];
             if ( pcr[pc2[j+24]] )	kn[n] |= bigbyte[j];
         }
     }
     return;
 }
 
 void cookey(register unsigned long *raw1, unsigned long *dough)
 {
     register unsigned long *cook,*raw0;
     register int i;
     
     cook = dough;
     for ( i = 0; i < 16; i++, raw1++ ) {
         raw0 = raw1++;
         *cook	 = (*raw0 & 0x00fc0000L) << 6;
         *cook	|= (*raw0 & 0x00000fc0L) << 10;
         *cook	|= (*raw1 & 0x00fc0000L) >> 10;
         *cook++	|= (*raw1 & 0x00000fc0L) >> 6;
         *cook	 = (*raw0 & 0x0003f000L) << 12;
         *cook	|= (*raw0 & 0x0000003fL) << 16;
         *cook	|= (*raw1 & 0x0003f000L) >> 4;
         *cook++	|= (*raw1 & 0x0000003fL);
     }
     return;
 }
 
 void scrunch(register unsigned char *outof, register unsigned long *into)
 {
     *into	 = (*outof++ & 0xffL) << 24;
     *into	|= (*outof++ & 0xffL) << 16;
     *into	|= (*outof++ & 0xffL) << 8;
     *into++	|= (*outof++ & 0xffL);
     *into	 = (*outof++ & 0xffL) << 24;
     *into	|= (*outof++ & 0xffL) << 16;
     *into	|= (*outof++ & 0xffL) << 8;
     *into++	|= (*outof   & 0xffL);
     return;
 }
 
 void unscrun(register unsigned long *outof, register unsigned char *into)
 {
     *into++	 = (unsigned char)((*outof >> 24) & 0xffL);
     *into++	 = (unsigned char)((*outof >> 16) & 0xffL);
     *into++	 = (unsigned char)((*outof >>  8) & 0xffL);
     *into++	 = (unsigned char)( *outof++	  & 0xffL);
     *into++	 = (unsigned char)((*outof >> 24) & 0xffL);
     *into++	 = (unsigned char)((*outof >> 16) & 0xffL);
     *into++	 = (unsigned char)((*outof >>  8) & 0xffL);
     *into	 = (unsigned char)( *outof		  & 0xffL);
     return;
 }
 
 void desfunc(register unsigned long *block,register unsigned long *keys)
 {
     register unsigned long fval, work, right, leftt;
     register int round;
     
     leftt = block[0];
     right = block[1];
     work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
     
     right ^= work;
     leftt ^= (work << 4);
     work = ((leftt >> 16) ^ right) & 0x0000ffffL;
     
     right ^= work;
     leftt ^= (work << 16);
     work = ((right >> 2) ^ leftt) & 0x33333333L;
     
     leftt ^= work;
     right ^= (work << 2);
     work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
     
     leftt ^= work;
     right ^= (work << 8);
     right = ((right << 1) | ((right >>31) & 1L)) & 0xffffffffL;
     work = (leftt ^ right) & 0xaaaaaaaaL;
     
     leftt ^= work;
     right ^= work;
     leftt = ((leftt << 1) | ((leftt >> 31)&1L)) & 0xffffffffL;
     
     for (round = 0; round < 8; round++) {
         work  = (right << 28) | (right >> 4);
         work ^= *keys++;
         fval  = SP7[ work	& 0x3fL];
         fval |= SP5[(work >>  8) & 0x3fL];
         fval |= SP3[(work >> 16) & 0x3fL];
         fval |= SP1[(work >> 24) & 0x3fL];
         work  = right ^ *keys++;
         fval |= SP8[ work 	& 0x3fL];
         fval |= SP6[(work >>  8) & 0x3fL];
         fval |= SP4[(work >> 16) & 0x3fL];
         fval |= SP2[(work >> 24) & 0x3fL];
         leftt ^= fval;
         work  = (leftt << 28) | (leftt >> 4);
         work ^= *keys++;
         fval  = SP7[ work 	& 0x3fL];
         fval |= SP5[(work >>  8) & 0x3fL];
         fval |= SP3[(work >> 16) & 0x3fL];
         fval |= SP1[(work >> 24) & 0x3fL];
         work  = leftt ^ *keys++;
         fval |= SP8[ work 	& 0x3fL];
         fval |= SP6[(work >>  8) & 0x3fL];
         fval |= SP4[(work >> 16) & 0x3fL];
         fval |= SP2[(work >> 24) & 0x3fL];
         right ^= fval;
     }
     
     right = (right << 31) | (right >> 1);
     work = (leftt ^ right) & 0xaaaaaaaaL;
     leftt ^= work;
     right ^= work;
     leftt = (leftt << 31) | (leftt >> 1);
     work = ((leftt >>  8) ^ right) & 0x00ff00ffL;
     right ^= work;
     leftt ^= (work << 8);
     work = ((leftt >>  2) ^ right) & 0x33333333L;
     right ^= work;
     leftt ^= (work << 2);
     work = ((right >> 16) ^ leftt) & 0x0000ffffL;
     leftt ^= work;
     right ^= (work << 16);
     work = ((right >>  4) ^ leftt) & 0x0f0f0f0fL;
     leftt ^= work;
     right ^= (work << 4);
     *block++ = right;
     *block = leftt;
     return;
 }
 
 /*****************************************************************
     OPENCOMM_DesExpandEncKey	: Expand Des Enc Key 扩展des加密密钥
     Return value:
         0         : Success
         other     : failed
     Parameters:
         pbDesKey        : 扩展前的DES密钥(8字节)       input
         ulDesKeyLen     : 扩展前的DES密钥长度          input
         pbDesEncKey     : 扩展后的DES加密密钥(128字节)  output
         *ulDesEncKeyLen : 扩展后的DES加密密钥长度       output
 *****************************************************************/
 unsigned long OPENCOMM_DesExpandEncKey(
         unsigned char *pbDesKey,
         unsigned long  ulDesKeyLen,
         unsigned char *pbDesEncKey,
         unsigned long *ulDesEncKeyLen)
 {
     unsigned long kn[32], dough[32];
     
     if (ulDesKeyLen != 8)
         return 0xEE20;
 
     deskey(pbDesKey, EN0, kn);
     cookey(kn, dough);
     *ulDesEncKeyLen = DES_KEYBYTES;  //32 long = 128 bytes
     memcpy(pbDesEncKey, dough, *ulDesEncKeyLen);
     
     return 0;
 }
 
 /*****************************************************************
     OPENCOMM_DesExpandDecKey	: Expand Des Dec Key 扩展des解密密钥
     Return value:
         0       : Success
         other   : failed
     Parameters:
         pbDesKey        : 扩展前的DES密钥(8字节)      input
         ulDesKeyLen     : 扩展前的DES密钥长度         input
         pbDesDecKey     : 扩展后的DES解密密钥(128字节) output
         *ulDesDecKeyLen : 扩展后的DES解密密钥长度      output
 *****************************************************************/
 unsigned long OPENCOMM_DesExpandDecKey(
         unsigned char *pbDesKey,
         unsigned long  ulDesKeyLen,
         unsigned char *pbDesDecKey,
         unsigned long *ulDesDecKeyLen)
 {
     unsigned long kn[32], dough[32];
     
     if (ulDesKeyLen != 8)
         return 0xEE20;
 
     deskey(pbDesKey, DE1, kn);
     cookey(kn, dough);
     *ulDesDecKeyLen = DES_KEYBYTES;  //32 long = 128 bytes
     memcpy(pbDesDecKey, dough, *ulDesDecKeyLen);
     
     return 0;
 }
 
 /****************************************************************
     OPENCOMM_DesEncRaw		: Des算法加密小整块明文8字节 
     Return value:
         0       : Success
         other   : failed
     Parameters:
         pbDesEncKey    : DES加密密钥    input
         ulDesEncKeyLen : DES加密密钥长度 input
         pbInData       : 待加密的明文    input
         ulInDataLen    : 待加密的明文长度 input
         pbOutData      : 加密后的密文    output
         *ulOutDataLen  : 加密后的密文长度 output
 *****************************************************************/
 unsigned long OPENCOMM_DesEncRaw(
         unsigned char *pbDesEncKey,
         unsigned long  ulDesEncKeyLen,
         unsigned char *pbInData,
         unsigned long  ulInDataLen,
         unsigned char *pbOutData,
         unsigned long *ulOutDataLen)
 {
     unsigned long work[2], ek[DES_KEYLONGS];
     unsigned char cp[DES_BLOCKLEN];
 
     if (ulInDataLen != DES_BLOCKLEN)
         return 0xEE20;
     
     if (ulDesEncKeyLen != DES_KEYBYTES)
         return 0xEE20;
 
     memcpy(cp, pbInData, DES_BLOCKLEN);
     scrunch(cp,work);  // 8 bytes -> 2 long
     memcpy(ek, pbDesEncKey, ulDesEncKeyLen);
     desfunc(work,ek);
     unscrun(work,cp); // 2 long -> 8 bytes
     memcpy(pbOutData, cp, DES_BLOCKLEN);
     *ulOutDataLen = DES_BLOCKLEN;
 
     return 0;
 }
 
 /*****************************************************************
     OPENCOMM_DesDecRaw : Des算法解密小整块密文8字节 
     Return value:
         0     : Success
         other : failed
     Parameters:
         pbDesDecKey    : DES解密密钥     input
         ulDesDecKeyLen : DES解密密钥长度  input
         pbInData       : 待解密的密文     input
         ulInDataLen    : 待解密的密文长度  input
         pbOutData      : 解密后的明文     output
         *ulOutDataLen  : 解密后的明文长度  output
 *****************************************************************/
 unsigned long OPENCOMM_DesDecRaw(
         unsigned char *pbDesDecKey,
         unsigned long  ulDesDecKeyLen,
         unsigned char *pbInData,
         unsigned long  ulInDataLen,
         unsigned char *pbOutData,
         unsigned long *ulOutDataLen)
 {
     unsigned long work[2], dk[DES_KEYLONGS];
     unsigned char cp[DES_BLOCKLEN];
 
     if (ulInDataLen != DES_BLOCKLEN)
         return 0xEE20;
     
     if (ulDesDecKeyLen != DES_KEYBYTES)
         return 0xEE20;
 
     memcpy(cp, pbInData, DES_BLOCKLEN);
     scrunch(cp,work);  // 8 bytes -> 2 long
     memcpy(dk, pbDesDecKey, ulDesDecKeyLen);
     desfunc(work,dk);
     unscrun(work,cp); // 2 long -> 8 bytes
     memcpy(pbOutData, cp, DES_BLOCKLEN);
 //	des_enc(pbDesEncKey, pbInData, pbOutData);
     *ulOutDataLen = DES_BLOCKLEN;
 
     return 0;
 }
 
 /*********************   DES    *********************/
 
 int myic_DESEncrypt(
         unsigned char *pDesKey,
         int            nDesKeyLen,
         unsigned char *pInData,
         int            nInDataLen,
         unsigned char *pOutData,
         int           *pOutDataLen)
 {
     unsigned char DesKeyBuf[32];
     unsigned char DesEncKeyBuf[128];
     int EncKeyLen, KeyLen = 0;
     int retval = 0, loops, i;
     
     if(nInDataLen%8 != 0)
         return 0xEE20;
     
     if(nDesKeyLen != 8)
         return 0xEE20;
     KeyLen = nDesKeyLen;
     memcpy(DesKeyBuf, pDesKey, nDesKeyLen);
 
     
     retval = OPENCOMM_DesExpandEncKey(DesKeyBuf, KeyLen,
         DesEncKeyBuf, (unsigned long *)&EncKeyLen);
     if(retval != 0)
         return retval;
 
     loops = nInDataLen/8;
     for(i = 0; i < loops; i++)
     {
         retval = OPENCOMM_DesEncRaw(DesEncKeyBuf, EncKeyLen, pInData + i*8,
             8, pOutData + i*8, (unsigned long *)pOutDataLen);
         if(retval != 0)
             return retval;
     }
     *pOutDataLen = nInDataLen;
     return retval;
 }
 
 
 int myic_DESDecrypt(
         unsigned char *pDesKey,
         int            nDesKeyLen,
         unsigned char *pInData,
         int            nInDataLen,
         unsigned char *pOutData,
         int           *pOutDataLen)
 {
     unsigned char DesKeyBuf[32];
     unsigned char DesDecKeyBuf[128];
     int DecKeyLen, KeyLen = 0;
     int retval = 0, loops, i;
     
     if(nInDataLen%8 != 0)
         return 0xEE20;
     
     if(nDesKeyLen != 8)
         return 0xEE20;
     KeyLen = nDesKeyLen;
     memcpy(DesKeyBuf, pDesKey, nDesKeyLen);
 
     retval = OPENCOMM_DesExpandDecKey(DesKeyBuf, KeyLen,
         DesDecKeyBuf, (unsigned long *)&DecKeyLen);
     if(retval != 0)
         return retval;
     
     loops = nInDataLen/8;
     for(i = 0; i < loops; i++)
     {
         retval = OPENCOMM_DesDecRaw(DesDecKeyBuf, DecKeyLen, pInData + i*8,
             8, pOutData + i*8, (unsigned long *)pOutDataLen);
         if(retval != 0)
             return retval;
     }
     *pOutDataLen = nInDataLen;
     return retval;
 }
 
 
 //对称明文数据打pading
 void  CW_dataPadAdd(int tag, unsigned char *date, unsigned int dateLen, 
                     unsigned char **padDate, unsigned int *padDateLen)
 {
     int           i, padLen;
     unsigned char *pTmp   = NULL;
     
     pTmp = (unsigned char *)malloc(dateLen+24);
     if (pTmp == NULL)
     {
         *padDate = NULL;
         return ;
     }
     memset(pTmp, 0, dateLen+24);
     memcpy(pTmp, date, dateLen);
     
     if (tag == 0)
     {
         padLen = 8 - dateLen % 8;
         for (i=0; i<padLen; i++)
         {
             pTmp[dateLen+i] = (char)padLen;
         }
         *padDateLen = dateLen + padLen;
     }
     else
     {
         padLen = 16 - dateLen % 16;
         for (i=0; i<padLen; i++)
         {
             pTmp[dateLen+i] = (char)padLen;
         }		
     }
     
     *padDateLen = dateLen + padLen;	
     *padDate = pTmp;
 }
 
 #define  USER_PASSWORD_KEY "abcd1234"
 
 
 //数据加密
 int DesEnc(
          unsigned char *pInData,
          int            nInDataLen,
          unsigned char *pOutData,
          int           *pOutDataLen)
 {
     int				rv;
     unsigned char	*padDate = NULL;
     unsigned int	padDateLen = 0;
 
     CW_dataPadAdd(0, pInData, (unsigned int )nInDataLen, &padDate, &padDateLen);
 
     rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
         padDate, (int)padDateLen, pOutData, pOutDataLen);
     if (rv != 0)
     {
         if (padDate != NULL)
         {
             free(padDate);
         }
         return rv;	
     }
 
     if (padDate != NULL)
     {
         free(padDate);
     }
     return 0;
 }
 
 
 //数据加密
 int DesEnc_raw(
     unsigned char *pInData,
     int            nInDataLen,
     unsigned char *pOutData,
     int           *pOutDataLen)
 {
     int				rv;
 //	unsigned char	*padDate = NULL;
 //	unsigned int	padDateLen = 0;
 
     rv = myic_DESEncrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
         pInData, (int)nInDataLen, pOutData, pOutDataLen);
     if (rv != 0)
     {
         return rv;	
     }
     return 0;
 }
 
 //解密分配内存错误
 #define  ERR_MALLOC 20
 //密码长度不是8的整数倍, 不合法
 #define  ERR_FILECONT 20
 
 
 //用户使用函数des解密
 int DesDec(
            unsigned char *pInData,
            int            nInDataLen,
            unsigned char *pOutData,
            int           *pOutDataLen)
 {
     int				rv;
     char			padChar;
     unsigned char 	*tmpPlain = NULL;
     
     tmpPlain =		(unsigned char *)malloc(nInDataLen+24);
     if (tmpPlain == NULL)
     {
         return ERR_MALLOC;
     }
     memset(tmpPlain, 0, nInDataLen+24);
 
     //解密
     rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
         pInData, nInDataLen, tmpPlain, pOutDataLen);
     if (rv != 0)
     {
         if (tmpPlain != NULL) free(tmpPlain);
         return rv;
     }
 
     //去pading
     padChar = tmpPlain[*pOutDataLen - 1];
     if ( (int)padChar<=0 || (int)padChar>8) //异常处理
     {
         if (tmpPlain) free(tmpPlain);
         return ERR_FILECONT;
     }
 
     *pOutDataLen = *pOutDataLen - (int)padChar;	
     //memset(tmpPlain + *pOutDataLen, 0, (int)padChar);	
     memcpy(pOutData, tmpPlain, *pOutDataLen);
     if (tmpPlain) free(tmpPlain);	
     return 0;
 }
 
 
 //用户使用函数des解密
 int DesDec_raw(
     unsigned char *pInData,
     int            nInDataLen,
     unsigned char *pOutData,
     int           *pOutDataLen)
 {
     int				rv;
     //char			padChar;
     //unsigned char 	*tmpPlain = NULL;
 
     /*
     tmpPlain =		(unsigned char *)malloc(nInDataLen+24);
     if (tmpPlain == NULL)
     {
         return ERR_MALLOC;
     }
     memset(tmpPlain, 0, nInDataLen+24);
     */
 
     //解密
     rv = myic_DESDecrypt((unsigned char *)USER_PASSWORD_KEY, strlen(USER_PASSWORD_KEY),
         pInData, nInDataLen, pOutData, pOutDataLen);
     if (rv != 0)
     {
         //if (tmpPlain != NULL) free(tmpPlain);
         return rv;
     }
     /*
     //去pading
     padChar = tmpPlain[*pOutDataLen - 1];
     if ( (int)padChar<=0 || (int)padChar>8) //异常处理
     {
         if (tmpPlain) free(tmpPlain);
         return ERR_FILECONT;
     }
 
     *pOutDataLen = *pOutDataLen - (int)padChar;	
     //memset(tmpPlain + *pOutDataLen, 0, (int)padChar);	
     memcpy(pOutData, tmpPlain, *pOutDataLen);
     if (tmpPlain) free(tmpPlain);	
     */
     return 0;
 }
 
 
 
 